Water Disinfectant Turns Medical Compounds Toxic

By Kathleen O'NeilA group of benign iodinated chemicals used for medical tests form highly toxic compounds when they go through drinking water disinfection, according to a new study ( 10.1021/es200983f). The research solves the mystery of the presence of the disinfection by-products in drinking water in areas in which there is no natural source of iodine.